GODRIVER-2965 Internalize description package (mongodb#1621)

Co-authored-by: Matt Dale <9760375+matthewdale@users.noreply.github.com>

event/description.go

@@ -0,0 +1,58 @@
+// Copyright (C) MongoDB, Inc. 2024-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package event
+
+import (
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo/address"
+	"go.mongodb.org/mongo-driver/tag"
+)
+
+// ServerDescription contains information about a node in a cluster. This is
+// created from hello command responses. If the value of the Kind field is
+// LoadBalancer, only the Addr and Kind fields will be set. All other fields
+// will be set to the zero value of the field's type.
+type ServerDescription struct {
+	Addr                     address.Address
+	Arbiters                 []string
+	Compression              []string // compression methods returned by server
+	CanonicalAddr            address.Address
+	ElectionID               bson.ObjectID
+	IsCryptd                 bool
+	HelloOK                  bool
+	Hosts                    []string
+	Kind                     string
+	LastWriteTime            time.Time
+	MaxBatchCount            uint32
+	MaxDocumentSize          uint32
+	MaxMessageSize           uint32
+	MaxWireVersion           int32
+	MinWireVersion           int32
+	Members                  []address.Address
+	Passives                 []string
+	Passive                  bool
+	Primary                  address.Address
+	ReadOnly                 bool
+	ServiceID                *bson.ObjectID // Only set for servers that are deployed behind a load balancer.
+	SessionTimeoutMinutes    *int64
+	SetName                  string
+	SetVersion               uint32
+	Tags                     tag.Set
+	TopologyVersionProcessID bson.ObjectID
+	TopologyVersionCounter   int64
+}
+
+// TopologyDescription contains information about a MongoDB cluster.
+type TopologyDescription struct {
+	Servers               []ServerDescription
+	SetName               string
+	Kind                  string
+	SessionTimeoutMinutes *int64
+	CompatibilityErr      error
+}

event/monitoring.go

@@ -12,7 +12,6 @@ import (
 
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/mongo/address"
-	"go.mongodb.org/mongo-driver/mongo/description"
 )
 
 // CommandStartedEvent represents an event generated when a command is sent to a server.
@@ -120,8 +119,8 @@ type PoolMonitor struct {
 type ServerDescriptionChangedEvent struct {
 	Address             address.Address
 	TopologyID          bson.ObjectID // A unique identifier for the topology this server is a part of
-	PreviousDescription description.Server
-	NewDescription      description.Server
+	PreviousDescription ServerDescription
+	NewDescription      ServerDescription
 }
 
 // ServerOpeningEvent is an event generated when the server is initialized.
@@ -139,8 +138,8 @@ type ServerClosedEvent struct {
 // TopologyDescriptionChangedEvent represents a topology description change.
 type TopologyDescriptionChangedEvent struct {
 	TopologyID          bson.ObjectID // A unique identifier for the topology this server is a part of
-	PreviousDescription description.Topology
-	NewDescription      description.Topology
+	PreviousDescription TopologyDescription
+	NewDescription      TopologyDescription
 }
 
 // TopologyOpeningEvent is an event generated when the topology is initialized.
@@ -162,7 +161,7 @@ type ServerHeartbeatStartedEvent struct {
 // ServerHeartbeatSucceededEvent is an event generated when the heartbeat succeeds.
 type ServerHeartbeatSucceededEvent struct {
 	Duration     time.Duration
-	Reply        description.Server
+	Reply        ServerDescription
 	ConnectionID string // The address this heartbeat was sent to with a unique identifier
 	Awaited      bool   // If this heartbeat was awaitable
 }